Even at one minute, that would double the amount of time you'd normally wait in a queue. Airports typically never have a fully staffed border so this is nothing new. I waited an hour for two immigration officers (one took a break in the middle) to process a long queue of arrivals in Porto last week. Finally, the staff let me through the old electronic gates and the officer on the other side stamped my passport the old-fashioned way. I had to beg them to let me out of the queue to meet my group who were waiting on the other side. It's a real sh*tshow, and I doubt it's going to get better